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1999 fored F250 diesle battery's keep going dead

New batteries, disconnected components checked cables,electrical lines for shorts,breaks,tested alt,belts put load on charging system. I'm in trouble can't find problem!

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  • Ford Master
  • 21,873 Answers

Did you disconnect both batteries then check for a draw ?
If you use a test light between one negative cable and the battery post, and the light glows, you have something on the truck that is drawing current when everything should be off.

Posted on May 04, 2013


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Posted on Jan 02, 2017

  • 60 Answers

SOURCE: Battery keeps going dead. Especially

Does the fuel pump stay running at all like when you shut off the engine?

Posted on Nov 24, 2008

  • 24 Answers

SOURCE: entire 1996 blazer electrical dies when starter solenoid engaged

bad ground cable,use a jumper cable from negative to alternator bracket, if it starts thats it.

Posted on Feb 07, 2009

  • 2 Answers

SOURCE: battery drains quickly

the starter could be draining it

Posted on Feb 28, 2009

  • 118 Answers

SOURCE: battery keep going dead, has new battery

Have you checked to see if the alternator is charging ? Run a volt meter on the battery with the engine running, have to have more than 14 volts. If 13 or less, then replace the alt.

Posted on Jan 18, 2010

  • 1 Answer

SOURCE: 1999 cadillac sts over charging

on the positive battery cable under back seat is a red device with small orange and bule wires called a thermister controls alt output.this device is no longer availible from gm good news is you can buy a resistor of 1600 ohms from radio shack for lees than a dollar plug it in to connector instead of the thermistor and chargeing goes back to normal. radio, windows ,cruise, control should go back normal also

Posted on Apr 26, 2010

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Put new battery in now car does power going to car at all. not able to start...nothing. located relay box and cross-over wire burned out and one red square fuse. how...

Hi there,

Sounds like your Main 30A Fuse Link (i.e. hot at all times) or an in-line fuse may have blown, during cable connection (or due to incorrect jump starting).

First, follow the RED + battery cable from the battery and check if there is an in-line fuse along the cable - replace if blown.

The Main 30A (depending on model) Fuse is situated up in the engine bay fuse box.

These fuses carry a lot of current and hence, are usually secured into the fuse box by either large screws or 8-10mm bolts. Look for the mounting screws/bolts on the side of the blown fuse (you may have to undo another component to gain access to your main fuse).

Make sure the battery is disconnected BEFORE you attempt to replace any fuses.

Good luck..

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Aug 04, 2011 | 1992 Subaru Legacy

4 Answers

"I have a 1999 ford taurus DOHC. My batteries keep

More like a rsidual draw with the key off. Try disconnecting he battery at night and see if that helps. Your car may run rough for 10 miles due to the computer memory being cleard with the ground cable disconnected.

Jul 02, 2011 | 1999 Ford Taurus

1 Answer

I need to change the generator on a 1999 pontiac bonneville

Don't you mean an alternator?

It is a straight forward proceedure that is relatively easy to do. Sure take you about 30 minutes if you are halfway mechanical. A couple of sockets and open end wrenches.

Would suggest you change your serpentine belt at the same time (if it hasn't been changed in the last year) since you will also have to remove that to change the alternator.

The alternator keeps the battery in your Pontiac going, constantly recharging it as you drive. The battery will quickly drain if the alternator is bad, so it must be replaced in that case. The alternator is mounted in the engine and naturally connected to the battery in all models, but other components could be in its way depending on the type of Pontiac you own. This will determine how difficult such a replacement will be.
Difficulty:Moderately Challenging Instructions

    • 1 Open the hood and disconnect the negative cable from the car battery.
    • 2 Remove the drive belt by rotating the belt tensioner with a wrench to relieve the tension, slipping the belt off while applying pressure from the wrench. Depending on the model, other components might need removal, like parts of the air cleaner (Grand Am and G6), the fuel injector sight shield (Bonneville) or the coolant recovery reservoir (Grand Prix).
    • 3 Disconnect any wire clamps that are on the clip at the alternator's end frame, then remove the rubber clamp and nut. These extra fasteners are not on all Pontiac models. Disconnect the electrical connector for the alternator. Remove the alternator by disconnecting its bolts.
    • 4 Mount the alternator in place on the engine and tighten the bolts to the specified torque for your model. Connect the electrical connector to the new alternator along with any other clamps that held the old alternator.
    • 5 Replace the drive belt by pushing the tensioner upward and slipping the belt back on it and the pulleys in the same way it was originally wrapped, then tighten the tensioner to the torque required for your vehicle. Replace any other components that were removed and reconnect the battery cable.

Read more: How to Replace a Pontiac Alternator '

Jun 02, 2011 | Pontiac Bonneville Cars & Trucks

2 Answers

My car keeps going dead, purchase a new battery yesterday the brake light and battery light is on will thuis cause car to go dead

YES! You have described a "NO CHARGING SYSTEM VOLTAGE' condition. You should have at least 14 to 14.5 volts at the battery with the engine running. If you don't, there are several possible causes:

1. Blown alternator fuse
2. Electrical cable between alternator & battery is broken or disconnected.
3. Alternator is not working/charging (voltage regulator inside the alternator).
4. Regulator at the alternator is disconnected or an open circuit exists between the alternator's regulator & underhood fuse box.

One quick way to verify "NO CHARGING SYSTEM VOLTAGE" is to start the engine and while it's running, disconnect the NEGATIVE battery cable. The moment you disconnect the cable, the engine will die. If it doesn't, you have a completely different problem -- the battery is dying over-night because there is an electrical drain on the battery after the key is turned off and removed.

If that's the case, and unless you know a good electrician, take it to an authorized Hyundai Service Center and have it properly diagnosed -- best advice I can give you without looking at the vehicle myhself.

You can gain access to Hyundai shop manuals and wiring diagrams by going to and register using the Vehicle's VIN #.

Hope this helps.

Feb 07, 2011 | 2000 Hyundai Accent

2 Answers

New battery keeps going dead.i exchanged later it went dead had alternator checked and it is ok

WEll, something is causing the issue.... First, fully charge the battery, then disconnect the negative and put a volt meter or test light in series (between the terminal and the cable). Disable interior lights, and test for draw of current.
Essentially, if the light lights, too much current is being drawn out of the battery. So, you disconnect fuses, and other items until the light goes out. This should help you find the offending component.

IF no light lighting, perhaps the battery itself has issues. Leave it disconnected overnight, and see if it is discharged...If yes, the battery would be suspect.

There are diodes in the alternator that fail and can cause voltage to be drained. Some tests to the alternator fail to reveal the fault. the best test is an Scope, but you can isolate diodes and test with continuity tester.

Feb 04, 2011 | 1999 Ford Escort

2 Answers

How do you change the fuel pump? is there a access panel and if so where is it located?

Removal & Installation
To Remove:

  1. Before servicing the vehicle, refer to the precautions at the beginning of
    this section.
  2. Release fuel pressure.
  3. Remove or disconnect the following:

    • The rear seat

      Electrical Connector

    • The fuel pump electrical connector

      Battery Cable

    • Battery cable

  4. Raise and safely support the vehicle
  5. Remove or disconnect the following:

    Fuel Tank Drain

    • Fuel from fuel tank

      Stabilizer Bar

      Stabilizer Bar and EVAP Canister

    • The rear stabilizer bar brackets from body
    • Stabilizer bar toward rear of vehicle

      Fuel Filler Tube

    • The fuel filler tube from fuel tank

      Fuel And EVAP Lines

    • Fuel and EVAP lines

  6. Position transmission jack under fuel tank assembly.
  7. Remove fuel tank straps bolts passenger side first.
  8. Lower fuel tank and remove the purge line and vent line.
  9. Disconnect fuel line from fuel pump module by depressing quick connect
    retainers with thumb and fore finger.
  10. Slide fuel pump module electrical connector lock to unlock.
  11. Disconnect the electrical connection from the fuel pump module, by pushing
    down on connector retainer and pulling connector off of module.

    Fuel Tank Locknut

  12. Use Special Tool # 6856 to remove fuel pump module locknut.
  13. Remove fuel pump and O-ring seal from tank. Discard old seal.

To Install:

  1. Wipe seal area of tank clean and place a new seal in position in the tank

    Fuel Tank Locator

  2. Position fuel pump in the tank.

    • Make sure the alignment tabs on the underside of the fuel pump module flange
      sits in the notches on the fuel tank.

  3. Position the locknut over the fuel pump module.
  4. Tighten the locknut using Special Tool # 6856

    • Torque to: 40.5 ft. lbs. (55 Nm)

    Over tightening the pump lock ring may
    result in a leak.

  5. Position the fuel tank on the transmission stand.
  6. Install or connect the following:

    • Fuel pump electrical connector into hole in the body
    • The purge and vent lines
    • Fuel tank and tank straps
    • The fuel filler tube and tighten the clamp
    • The stabilizer bar and install bolts

  7. Lower vehicle.
  8. Install or connect the following:

    • The fuel pump electrical connector that is in the rear seat
    • The rear seat
    • The battery cable

  9. Fill fuel tank.
  10. Use the DRB or equivalent scan tool to pressurize the fuel system.
  11. Check for leaks.

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Sep 23, 2010 | 1999 Chrysler Concorde

1 Answer

Truck is electrically dead, battery and connection are good.

Check your positive battery cable. They have a fusable link in them that may have burnt out. Use a test light to see if it has power all the way down to the starter.

Jun 15, 2009 | 1999 Ford F250 Regular Cab

1 Answer

99 F250 Electrical ???

Check your Belt Tensioner. If the Belt Tensioner is Not Holding the Belt Tight Enough it will not allow the Alternator to Charge the Battery. Let me know. Please Rate my Solution, I need all the Help that I can Get! Thanks!

Jan 29, 2009 | 1999 Ford F250 Regular Cab

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